* {
  padding: 0;
  margin: 0;
}
html,
body {
  height: 100%;
}
body {
  font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color: #2c3e50;
}
.extra-large-title {
  font-size: 20px;
}
